Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d02bfa59806a12a…

MALICIOUS

PDF

84.9 KB Created: 2021-06-04 01:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3385595756f3a86827a51cff8eaa3bac SHA-1: eaf2acf1f18d9aad9f8d89301dd9985a19b6204a SHA-256: 3d02bfa59806a12a9932884daf3c1553371b9ddf53f08114a7d1a1c0fe54db4f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://vilenefex.ru/123?utm_term=cisco+firepower+ngips+configuration+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481053/normal_5fecbcbad8a4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468294/normal_600bca93d63b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373999/normal_6040b353c30da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478415/normal_60262e4d14f5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501654/normal_5ff965c6a35da.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8ab0f1f-812d-46ba-9282-9db21ace2cc7/1983_code_of_canon_law_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f216237-e99c-47d8-b34c-5b8f927ea30a/71584448827.pdfIn PDF document text
    • http://wikitaxif.pbworks.com/f/cognitive_psychology_connecting_mind_research_and_everyday_experience_5th_edition.pdfIn PDF document text
    • http://lifelekufa.pbworks.com/f/how_to_install_magisk_manager_on_rooted_device.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71e762e6-26cc-4450-af5a-63ca2d53d1fc/12857263002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f82331a6-0449-497f-8740-5e85635c3158/24412446518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9de865f-934c-425f-9e62-edad6e68241b/the_battle_plan_for_prayer_bible_study_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01db3992-9ce5-4345-af97-ed6542032535/the_exorcist_2000_imdb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9288767-9502-48dd-b8d5-c7ec11c414c3/gosasomelisuruselel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2c12450-b24b-4c3e-8904-23ea3c90dff1/zixaxomerolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8e63168-3948-4bc7-bfb8-67e52cd239f4/wooldridge_cross_section_and_panel_data.pdfIn PDF document text
    • http://vedufid.pbworks.com/w/file/fetch/144577881/11047689246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9937c6e1-ff07-453d-91d6-2890f2349ffa/how_to_tell_if_a_compound_ionic_or_covalent.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/w/file/fetch/144422268/nufevoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2e66e42-b182-4044-b946-52490df68030/how_to_clean_ge_oven_glass.pdfIn PDF document text
    • http://dajodovilav.pbworks.com/f/how_to_get_unlimited_stars_in_homescapes_game.pdfIn PDF document text
    • http://gogoporiwo.pbworks.com/f/how_to_use_ehub_for_allied_universal.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E58 5288 bytes
SHA-256: d80c76fea1e2cb1ebd77102628113e57055b266c77e11c80ad2e9d935a3fa328
font_01_sfnt_off00012079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12079 11084 bytes
SHA-256: 47142e251a05d3f8c4c5409fb66d03a8a0d16910cd3bee828ae90ecaa89b6168